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Adam Green / Mbed 2 deprecated WeatherStation

Web server based weather station using Sparkfun Weather Meters.

Dependencies: FatFileSystem mbed WeatherMeters SDFileSystem

NetStack/lwip/include/lwip/tcp.h@0:616601bde9fb, 2012-02-23 (annotated)

Committer:: AdamGreen
Date:: Thu Feb 23 21:38:39 2012 +0000
Revision:: 0:616601bde9fb

Who changed what in which revision?

User	Revision	Line number	New contents of line
AdamGreen	0:616601bde9fb	1	/*
AdamGreen	0:616601bde9fb	2	* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
AdamGreen	0:616601bde9fb	3	* All rights reserved.
AdamGreen	0:616601bde9fb	4	*
AdamGreen	0:616601bde9fb	5	* Redistribution and use in source and binary forms, with or without modification,
AdamGreen	0:616601bde9fb	6	* are permitted provided that the following conditions are met:
AdamGreen	0:616601bde9fb	7	*
AdamGreen	0:616601bde9fb	8	* 1. Redistributions of source code must retain the above copyright notice,
AdamGreen	0:616601bde9fb	9	* this list of conditions and the following disclaimer.
AdamGreen	0:616601bde9fb	10	* 2. Redistributions in binary form must reproduce the above copyright notice,
AdamGreen	0:616601bde9fb	11	* this list of conditions and the following disclaimer in the documentation
AdamGreen	0:616601bde9fb	12	* and/or other materials provided with the distribution.
AdamGreen	0:616601bde9fb	13	* 3. The name of the author may not be used to endorse or promote products
AdamGreen	0:616601bde9fb	14	* derived from this software without specific prior written permission.
AdamGreen	0:616601bde9fb	15	*
AdamGreen	0:616601bde9fb	16	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
AdamGreen	0:616601bde9fb	17	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
AdamGreen	0:616601bde9fb	18	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
AdamGreen	0:616601bde9fb	19	* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
AdamGreen	0:616601bde9fb	20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
AdamGreen	0:616601bde9fb	21	* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
AdamGreen	0:616601bde9fb	22	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
AdamGreen	0:616601bde9fb	23	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
AdamGreen	0:616601bde9fb	24	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
AdamGreen	0:616601bde9fb	25	* OF SUCH DAMAGE.
AdamGreen	0:616601bde9fb	26	*
AdamGreen	0:616601bde9fb	27	* This file is part of the lwIP TCP/IP stack.
AdamGreen	0:616601bde9fb	28	*
AdamGreen	0:616601bde9fb	29	* Author: Adam Dunkels <adam@sics.se>
AdamGreen	0:616601bde9fb	30	*
AdamGreen	0:616601bde9fb	31	*/
AdamGreen	0:616601bde9fb	32	#ifndef __LWIP_TCP_H__
AdamGreen	0:616601bde9fb	33	#define __LWIP_TCP_H__
AdamGreen	0:616601bde9fb	34
AdamGreen	0:616601bde9fb	35	#include "lwip/opt.h"
AdamGreen	0:616601bde9fb	36
AdamGreen	0:616601bde9fb	37	#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
AdamGreen	0:616601bde9fb	38
AdamGreen	0:616601bde9fb	39	#include "lwip/sys.h"
AdamGreen	0:616601bde9fb	40	#include "lwip/mem.h"
AdamGreen	0:616601bde9fb	41	#include "lwip/pbuf.h"
AdamGreen	0:616601bde9fb	42	#include "lwip/ip.h"
AdamGreen	0:616601bde9fb	43	#include "lwip/icmp.h"
AdamGreen	0:616601bde9fb	44	#include "lwip/err.h"
AdamGreen	0:616601bde9fb	45
AdamGreen	0:616601bde9fb	46	#ifdef __cplusplus
AdamGreen	0:616601bde9fb	47	extern "C" {
AdamGreen	0:616601bde9fb	48	#endif
AdamGreen	0:616601bde9fb	49
AdamGreen	0:616601bde9fb	50	struct tcp_pcb;
AdamGreen	0:616601bde9fb	51
AdamGreen	0:616601bde9fb	52	/** Function prototype for tcp accept callback functions. Called when a new
AdamGreen	0:616601bde9fb	53	* connection can be accepted on a listening pcb.
AdamGreen	0:616601bde9fb	54	*
AdamGreen	0:616601bde9fb	55	* @param arg Additional argument to pass to the callback function (@see tcp_arg())
AdamGreen	0:616601bde9fb	56	* @param newpcb The new connection pcb
AdamGreen	0:616601bde9fb	57	* @param err An error code if there has been an error accepting.
AdamGreen	0:616601bde9fb	58	* Only return ERR_ABRT if you have called tcp_abort from within the
AdamGreen	0:616601bde9fb	59	* callback function!
AdamGreen	0:616601bde9fb	60	*/
AdamGreen	0:616601bde9fb	61	typedef err_t (tcp_accept_fn)(void arg, struct tcp_pcb *newpcb, err_t err);
AdamGreen	0:616601bde9fb	62
AdamGreen	0:616601bde9fb	63	/** Function prototype for tcp receive callback functions. Called when data has
AdamGreen	0:616601bde9fb	64	* been received.
AdamGreen	0:616601bde9fb	65	*
AdamGreen	0:616601bde9fb	66	* @param arg Additional argument to pass to the callback function (@see tcp_arg())
AdamGreen	0:616601bde9fb	67	* @param tpcb The connection pcb which received data
AdamGreen	0:616601bde9fb	68	* @param p The received data (or NULL when the connection has been closed!)
AdamGreen	0:616601bde9fb	69	* @param err An error code if there has been an error receiving
AdamGreen	0:616601bde9fb	70	* Only return ERR_ABRT if you have called tcp_abort from within the
AdamGreen	0:616601bde9fb	71	* callback function!
AdamGreen	0:616601bde9fb	72	*/
AdamGreen	0:616601bde9fb	73	typedef err_t (tcp_recv_fn)(void arg, struct tcp_pcb *tpcb,
AdamGreen	0:616601bde9fb	74	struct pbuf *p, err_t err);
AdamGreen	0:616601bde9fb	75
AdamGreen	0:616601bde9fb	76	/** Function prototype for tcp sent callback functions. Called when sent data has
AdamGreen	0:616601bde9fb	77	* been acknowledged by the remote side. Use it to free corresponding resources.
AdamGreen	0:616601bde9fb	78	* This also means that the pcb has now space available to send new data.
AdamGreen	0:616601bde9fb	79	*
AdamGreen	0:616601bde9fb	80	* @param arg Additional argument to pass to the callback function (@see tcp_arg())
AdamGreen	0:616601bde9fb	81	* @param tpcb The connection pcb for which data has been acknowledged
AdamGreen	0:616601bde9fb	82	* @param len The amount of bytes acknowledged
AdamGreen	0:616601bde9fb	83	* @return ERR_OK: try to send some data by calling tcp_output
AdamGreen	0:616601bde9fb	84	* Only return ERR_ABRT if you have called tcp_abort from within the
AdamGreen	0:616601bde9fb	85	* callback function!
AdamGreen	0:616601bde9fb	86	*/
AdamGreen	0:616601bde9fb	87	typedef err_t (tcp_sent_fn)(void arg, struct tcp_pcb *tpcb,
AdamGreen	0:616601bde9fb	88	u16_t len);
AdamGreen	0:616601bde9fb	89
AdamGreen	0:616601bde9fb	90	/** Function prototype for tcp poll callback functions. Called periodically as
AdamGreen	0:616601bde9fb	91	* specified by @see tcp_poll.
AdamGreen	0:616601bde9fb	92	*
AdamGreen	0:616601bde9fb	93	* @param arg Additional argument to pass to the callback function (@see tcp_arg())
AdamGreen	0:616601bde9fb	94	* @param tpcb tcp pcb
AdamGreen	0:616601bde9fb	95	* @return ERR_OK: try to send some data by calling tcp_output
AdamGreen	0:616601bde9fb	96	* Only return ERR_ABRT if you have called tcp_abort from within the
AdamGreen	0:616601bde9fb	97	* callback function!
AdamGreen	0:616601bde9fb	98	*/
AdamGreen	0:616601bde9fb	99	typedef err_t (tcp_poll_fn)(void arg, struct tcp_pcb *tpcb);
AdamGreen	0:616601bde9fb	100
AdamGreen	0:616601bde9fb	101	/** Function prototype for tcp error callback functions. Called when the pcb
AdamGreen	0:616601bde9fb	102	* receives a RST or is unexpectedly closed for any other reason.
AdamGreen	0:616601bde9fb	103	*
AdamGreen	0:616601bde9fb	104	* @note The corresponding pcb is already freed when this callback is called!
AdamGreen	0:616601bde9fb	105	*
AdamGreen	0:616601bde9fb	106	* @param arg Additional argument to pass to the callback function (@see tcp_arg())
AdamGreen	0:616601bde9fb	107	* @param err Error code to indicate why the pcb has been closed
AdamGreen	0:616601bde9fb	108	* ERR_ABRT: aborted through tcp_abort or by a TCP timer
AdamGreen	0:616601bde9fb	109	* ERR_RST: the connection was reset by the remote host
AdamGreen	0:616601bde9fb	110	*/
AdamGreen	0:616601bde9fb	111	typedef void (tcp_err_fn)(void arg, err_t err);
AdamGreen	0:616601bde9fb	112
AdamGreen	0:616601bde9fb	113	/** Function prototype for tcp connected callback functions. Called when a pcb
AdamGreen	0:616601bde9fb	114	* is connected to the remote side after initiating a connection attempt by
AdamGreen	0:616601bde9fb	115	* calling tcp_connect().
AdamGreen	0:616601bde9fb	116	*
AdamGreen	0:616601bde9fb	117	* @param arg Additional argument to pass to the callback function (@see tcp_arg())
AdamGreen	0:616601bde9fb	118	* @param tpcb The connection pcb which is connected
AdamGreen	0:616601bde9fb	119	* @param err An unused error code, always ERR_OK currently ;-) TODO!
AdamGreen	0:616601bde9fb	120	* Only return ERR_ABRT if you have called tcp_abort from within the
AdamGreen	0:616601bde9fb	121	* callback function!
AdamGreen	0:616601bde9fb	122	*
AdamGreen	0:616601bde9fb	123	* @note When a connection attempt fails, the error callback is currently called!
AdamGreen	0:616601bde9fb	124	*/
AdamGreen	0:616601bde9fb	125	typedef err_t (tcp_connected_fn)(void arg, struct tcp_pcb *tpcb, err_t err);
AdamGreen	0:616601bde9fb	126
AdamGreen	0:616601bde9fb	127	enum tcp_state {
AdamGreen	0:616601bde9fb	128	CLOSED = 0,
AdamGreen	0:616601bde9fb	129	LISTEN = 1,
AdamGreen	0:616601bde9fb	130	SYN_SENT = 2,
AdamGreen	0:616601bde9fb	131	SYN_RCVD = 3,
AdamGreen	0:616601bde9fb	132	ESTABLISHED = 4,
AdamGreen	0:616601bde9fb	133	FIN_WAIT_1 = 5,
AdamGreen	0:616601bde9fb	134	FIN_WAIT_2 = 6,
AdamGreen	0:616601bde9fb	135	CLOSE_WAIT = 7,
AdamGreen	0:616601bde9fb	136	CLOSING = 8,
AdamGreen	0:616601bde9fb	137	LAST_ACK = 9,
AdamGreen	0:616601bde9fb	138	TIME_WAIT = 10
AdamGreen	0:616601bde9fb	139	};
AdamGreen	0:616601bde9fb	140
AdamGreen	0:616601bde9fb	141	#if LWIP_CALLBACK_API
AdamGreen	0:616601bde9fb	142	/* Function to call when a listener has been connected.
AdamGreen	0:616601bde9fb	143	* @param arg user-supplied argument (tcp_pcb.callback_arg)
AdamGreen	0:616601bde9fb	144	* @param pcb a new tcp_pcb that now is connected
AdamGreen	0:616601bde9fb	145	* @param err an error argument (TODO: that is current always ERR_OK?)
AdamGreen	0:616601bde9fb	146	* @return ERR_OK: accept the new connection,
AdamGreen	0:616601bde9fb	147	* any other err_t abortsthe new connection
AdamGreen	0:616601bde9fb	148	*/
AdamGreen	0:616601bde9fb	149	#define DEF_ACCEPT_CALLBACK tcp_accept_fn accept;
AdamGreen	0:616601bde9fb	150	#else /* LWIP_CALLBACK_API */
AdamGreen	0:616601bde9fb	151	#define DEF_ACCEPT_CALLBACK
AdamGreen	0:616601bde9fb	152	#endif /* LWIP_CALLBACK_API */
AdamGreen	0:616601bde9fb	153
AdamGreen	0:616601bde9fb	154	/**
AdamGreen	0:616601bde9fb	155	* members common to struct tcp_pcb and struct tcp_listen_pcb
AdamGreen	0:616601bde9fb	156	*/
AdamGreen	0:616601bde9fb	157	#define TCP_PCB_COMMON(type) \
AdamGreen	0:616601bde9fb	158	type next; / for the linked list */ \
AdamGreen	0:616601bde9fb	159	enum tcp_state state; /* TCP state */ \
AdamGreen	0:616601bde9fb	160	u8_t prio; \
AdamGreen	0:616601bde9fb	161	void *callback_arg; \
AdamGreen	0:616601bde9fb	162	/* the accept callback for listen- and normal pcbs, if LWIP_CALLBACK_API */ \
AdamGreen	0:616601bde9fb	163	DEF_ACCEPT_CALLBACK \
AdamGreen	0:616601bde9fb	164	/* ports are in host byte order */ \
AdamGreen	0:616601bde9fb	165	u16_t local_port
AdamGreen	0:616601bde9fb	166
AdamGreen	0:616601bde9fb	167
AdamGreen	0:616601bde9fb	168	/* the TCP protocol control block */
AdamGreen	0:616601bde9fb	169	struct tcp_pcb {
AdamGreen	0:616601bde9fb	170	/** common PCB members */
AdamGreen	0:616601bde9fb	171	IP_PCB;
AdamGreen	0:616601bde9fb	172	/** protocol specific PCB members */
AdamGreen	0:616601bde9fb	173	TCP_PCB_COMMON(struct tcp_pcb);
AdamGreen	0:616601bde9fb	174
AdamGreen	0:616601bde9fb	175	/* ports are in host byte order */
AdamGreen	0:616601bde9fb	176	u16_t remote_port;
AdamGreen	0:616601bde9fb	177
AdamGreen	0:616601bde9fb	178	u8_t flags;
AdamGreen	0:616601bde9fb	179	#define TF_ACK_DELAY ((u8_t)0x01U) /* Delayed ACK. */
AdamGreen	0:616601bde9fb	180	#define TF_ACK_NOW ((u8_t)0x02U) /* Immediate ACK. */
AdamGreen	0:616601bde9fb	181	#define TF_INFR ((u8_t)0x04U) /* In fast recovery. */
AdamGreen	0:616601bde9fb	182	#define TF_TIMESTAMP ((u8_t)0x08U) /* Timestamp option enabled */
AdamGreen	0:616601bde9fb	183	#define TF_RXCLOSED ((u8_t)0x10U) /* rx closed by tcp_shutdown */
AdamGreen	0:616601bde9fb	184	#define TF_FIN ((u8_t)0x20U) /* Connection was closed locally (FIN segment enqueued). */
AdamGreen	0:616601bde9fb	185	#define TF_NODELAY ((u8_t)0x40U) /* Disable Nagle algorithm */
AdamGreen	0:616601bde9fb	186	#define TF_NAGLEMEMERR ((u8_t)0x80U) /* nagle enabled, memerr, try to output to prevent delayed ACK to happen */
AdamGreen	0:616601bde9fb	187
AdamGreen	0:616601bde9fb	188	/* the rest of the fields are in host byte order
AdamGreen	0:616601bde9fb	189	as we have to do some math with them */
AdamGreen	0:616601bde9fb	190	/* receiver variables */
AdamGreen	0:616601bde9fb	191	u32_t rcv_nxt; /* next seqno expected */
AdamGreen	0:616601bde9fb	192	u16_t rcv_wnd; /* receiver window available */
AdamGreen	0:616601bde9fb	193	u16_t rcv_ann_wnd; /* receiver window to announce */
AdamGreen	0:616601bde9fb	194	u32_t rcv_ann_right_edge; /* announced right edge of window */
AdamGreen	0:616601bde9fb	195
AdamGreen	0:616601bde9fb	196	/* Timers */
AdamGreen	0:616601bde9fb	197	u32_t tmr;
AdamGreen	0:616601bde9fb	198	u8_t polltmr, pollinterval;
AdamGreen	0:616601bde9fb	199
AdamGreen	0:616601bde9fb	200	/* Retransmission timer. */
AdamGreen	0:616601bde9fb	201	s16_t rtime;
AdamGreen	0:616601bde9fb	202
AdamGreen	0:616601bde9fb	203	u16_t mss; /* maximum segment size */
AdamGreen	0:616601bde9fb	204
AdamGreen	0:616601bde9fb	205	/* RTT (round trip time) estimation variables */
AdamGreen	0:616601bde9fb	206	u32_t rttest; /* RTT estimate in 500ms ticks */
AdamGreen	0:616601bde9fb	207	u32_t rtseq; /* sequence number being timed */
AdamGreen	0:616601bde9fb	208	s16_t sa, sv; /* @todo document this */
AdamGreen	0:616601bde9fb	209
AdamGreen	0:616601bde9fb	210	s16_t rto; /* retransmission time-out */
AdamGreen	0:616601bde9fb	211	u8_t nrtx; /* number of retransmissions */
AdamGreen	0:616601bde9fb	212
AdamGreen	0:616601bde9fb	213	/* fast retransmit/recovery */
AdamGreen	0:616601bde9fb	214	u32_t lastack; /* Highest acknowledged seqno. */
AdamGreen	0:616601bde9fb	215	u8_t dupacks;
AdamGreen	0:616601bde9fb	216
AdamGreen	0:616601bde9fb	217	/* congestion avoidance/control variables */
AdamGreen	0:616601bde9fb	218	u16_t cwnd;
AdamGreen	0:616601bde9fb	219	u16_t ssthresh;
AdamGreen	0:616601bde9fb	220
AdamGreen	0:616601bde9fb	221	/* sender variables */
AdamGreen	0:616601bde9fb	222	u32_t snd_nxt; /* next new seqno to be sent */
AdamGreen	0:616601bde9fb	223	u16_t snd_wnd; /* sender window */
AdamGreen	0:616601bde9fb	224	u32_t snd_wl1, snd_wl2; /* Sequence and acknowledgement numbers of last
AdamGreen	0:616601bde9fb	225	window update. */
AdamGreen	0:616601bde9fb	226	u32_t snd_lbb; /* Sequence number of next byte to be buffered. */
AdamGreen	0:616601bde9fb	227
AdamGreen	0:616601bde9fb	228	u16_t acked;
AdamGreen	0:616601bde9fb	229
AdamGreen	0:616601bde9fb	230	u16_t snd_buf; /* Available buffer space for sending (in bytes). */
AdamGreen	0:616601bde9fb	231	#define TCP_SNDQUEUELEN_OVERFLOW (0xffff-3)
AdamGreen	0:616601bde9fb	232	u16_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */
AdamGreen	0:616601bde9fb	233
AdamGreen	0:616601bde9fb	234	#if TCP_OVERSIZE
AdamGreen	0:616601bde9fb	235	/* Extra bytes available at the end of the last pbuf in unsent. */
AdamGreen	0:616601bde9fb	236	u16_t unsent_oversize;
AdamGreen	0:616601bde9fb	237	#endif /* TCP_OVERSIZE */
AdamGreen	0:616601bde9fb	238
AdamGreen	0:616601bde9fb	239	/* These are ordered by sequence number: */
AdamGreen	0:616601bde9fb	240	struct tcp_seg unsent; / Unsent (queued) segments. */
AdamGreen	0:616601bde9fb	241	struct tcp_seg unacked; / Sent but unacknowledged segments. */
AdamGreen	0:616601bde9fb	242	#if TCP_QUEUE_OOSEQ
AdamGreen	0:616601bde9fb	243	struct tcp_seg ooseq; / Received out of sequence segments. */
AdamGreen	0:616601bde9fb	244	#endif /* TCP_QUEUE_OOSEQ */
AdamGreen	0:616601bde9fb	245
AdamGreen	0:616601bde9fb	246	struct pbuf refused_data; / Data previously received but not yet taken by upper layer */
AdamGreen	0:616601bde9fb	247
AdamGreen	0:616601bde9fb	248	#if LWIP_CALLBACK_API
AdamGreen	0:616601bde9fb	249	/* Function to be called when more send buffer space is available. */
AdamGreen	0:616601bde9fb	250	tcp_sent_fn sent;
AdamGreen	0:616601bde9fb	251	/* Function to be called when (in-sequence) data has arrived. */
AdamGreen	0:616601bde9fb	252	tcp_recv_fn recv;
AdamGreen	0:616601bde9fb	253	/* Function to be called when a connection has been set up. */
AdamGreen	0:616601bde9fb	254	tcp_connected_fn connected;
AdamGreen	0:616601bde9fb	255	/* Function which is called periodically. */
AdamGreen	0:616601bde9fb	256	tcp_poll_fn poll;
AdamGreen	0:616601bde9fb	257	/* Function to be called whenever a fatal error occurs. */
AdamGreen	0:616601bde9fb	258	tcp_err_fn errf;
AdamGreen	0:616601bde9fb	259	#endif /* LWIP_CALLBACK_API */
AdamGreen	0:616601bde9fb	260
AdamGreen	0:616601bde9fb	261	#if LWIP_TCP_TIMESTAMPS
AdamGreen	0:616601bde9fb	262	u32_t ts_lastacksent;
AdamGreen	0:616601bde9fb	263	u32_t ts_recent;
AdamGreen	0:616601bde9fb	264	#endif /* LWIP_TCP_TIMESTAMPS */
AdamGreen	0:616601bde9fb	265
AdamGreen	0:616601bde9fb	266	/* idle time before KEEPALIVE is sent */
AdamGreen	0:616601bde9fb	267	u32_t keep_idle;
AdamGreen	0:616601bde9fb	268	#if LWIP_TCP_KEEPALIVE
AdamGreen	0:616601bde9fb	269	u32_t keep_intvl;
AdamGreen	0:616601bde9fb	270	u32_t keep_cnt;
AdamGreen	0:616601bde9fb	271	#endif /* LWIP_TCP_KEEPALIVE */
AdamGreen	0:616601bde9fb	272
AdamGreen	0:616601bde9fb	273	/* Persist timer counter */
AdamGreen	0:616601bde9fb	274	u32_t persist_cnt;
AdamGreen	0:616601bde9fb	275	/* Persist timer back-off */
AdamGreen	0:616601bde9fb	276	u8_t persist_backoff;
AdamGreen	0:616601bde9fb	277
AdamGreen	0:616601bde9fb	278	/* KEEPALIVE counter */
AdamGreen	0:616601bde9fb	279	u8_t keep_cnt_sent;
AdamGreen	0:616601bde9fb	280	};
AdamGreen	0:616601bde9fb	281
AdamGreen	0:616601bde9fb	282	struct tcp_pcb_listen {
AdamGreen	0:616601bde9fb	283	/* Common members of all PCB types */
AdamGreen	0:616601bde9fb	284	IP_PCB;
AdamGreen	0:616601bde9fb	285	/* Protocol specific PCB members */
AdamGreen	0:616601bde9fb	286	TCP_PCB_COMMON(struct tcp_pcb_listen);
AdamGreen	0:616601bde9fb	287
AdamGreen	0:616601bde9fb	288	#if TCP_LISTEN_BACKLOG
AdamGreen	0:616601bde9fb	289	u8_t backlog;
AdamGreen	0:616601bde9fb	290	u8_t accepts_pending;
AdamGreen	0:616601bde9fb	291	#endif /* TCP_LISTEN_BACKLOG */
AdamGreen	0:616601bde9fb	292	};
AdamGreen	0:616601bde9fb	293
AdamGreen	0:616601bde9fb	294	#if LWIP_EVENT_API
AdamGreen	0:616601bde9fb	295
AdamGreen	0:616601bde9fb	296	enum lwip_event {
AdamGreen	0:616601bde9fb	297	LWIP_EVENT_ACCEPT,
AdamGreen	0:616601bde9fb	298	LWIP_EVENT_SENT,
AdamGreen	0:616601bde9fb	299	LWIP_EVENT_RECV,
AdamGreen	0:616601bde9fb	300	LWIP_EVENT_CONNECTED,
AdamGreen	0:616601bde9fb	301	LWIP_EVENT_POLL,
AdamGreen	0:616601bde9fb	302	LWIP_EVENT_ERR
AdamGreen	0:616601bde9fb	303	};
AdamGreen	0:616601bde9fb	304
AdamGreen	0:616601bde9fb	305	err_t lwip_tcp_event(void arg, struct tcp_pcb pcb,
AdamGreen	0:616601bde9fb	306	enum lwip_event,
AdamGreen	0:616601bde9fb	307	struct pbuf *p,
AdamGreen	0:616601bde9fb	308	u16_t size,
AdamGreen	0:616601bde9fb	309	err_t err);
AdamGreen	0:616601bde9fb	310
AdamGreen	0:616601bde9fb	311	#endif /* LWIP_EVENT_API */
AdamGreen	0:616601bde9fb	312
AdamGreen	0:616601bde9fb	313	/* Application program's interface: */
AdamGreen	0:616601bde9fb	314	struct tcp_pcb * tcp_new (void);
AdamGreen	0:616601bde9fb	315
AdamGreen	0:616601bde9fb	316	void tcp_arg (struct tcp_pcb pcb, void arg);
AdamGreen	0:616601bde9fb	317	void tcp_accept (struct tcp_pcb *pcb, tcp_accept_fn accept);
AdamGreen	0:616601bde9fb	318	void tcp_recv (struct tcp_pcb *pcb, tcp_recv_fn recv);
AdamGreen	0:616601bde9fb	319	void tcp_sent (struct tcp_pcb *pcb, tcp_sent_fn sent);
AdamGreen	0:616601bde9fb	320	void tcp_poll (struct tcp_pcb *pcb, tcp_poll_fn poll, u8_t interval);
AdamGreen	0:616601bde9fb	321	void tcp_err (struct tcp_pcb *pcb, tcp_err_fn err);
AdamGreen	0:616601bde9fb	322
AdamGreen	0:616601bde9fb	323	#define tcp_mss(pcb) (((pcb)->flags & TF_TIMESTAMP) ? ((pcb)->mss - 12) : (pcb)->mss)
AdamGreen	0:616601bde9fb	324	#define tcp_sndbuf(pcb) ((pcb)->snd_buf)
AdamGreen	0:616601bde9fb	325	#define tcp_sndqueuelen(pcb) ((pcb)->snd_queuelen)
AdamGreen	0:616601bde9fb	326	#define tcp_nagle_disable(pcb) ((pcb)->flags \|= TF_NODELAY)
AdamGreen	0:616601bde9fb	327	#define tcp_nagle_enable(pcb) ((pcb)->flags &= ~TF_NODELAY)
AdamGreen	0:616601bde9fb	328	#define tcp_nagle_disabled(pcb) (((pcb)->flags & TF_NODELAY) != 0)
AdamGreen	0:616601bde9fb	329
AdamGreen	0:616601bde9fb	330	#if TCP_LISTEN_BACKLOG
AdamGreen	0:616601bde9fb	331	#define tcp_accepted(pcb) do { \
AdamGreen	0:616601bde9fb	332	LWIP_ASSERT("pcb->state == LISTEN (called for wrong pcb?)", pcb->state == LISTEN); \
AdamGreen	0:616601bde9fb	333	(((struct tcp_pcb_listen *)(pcb))->accepts_pending--); } while(0)
AdamGreen	0:616601bde9fb	334	#else /* TCP_LISTEN_BACKLOG */
AdamGreen	0:616601bde9fb	335	#define tcp_accepted(pcb) LWIP_ASSERT("pcb->state == LISTEN (called for wrong pcb?)", \
AdamGreen	0:616601bde9fb	336	pcb->state == LISTEN)
AdamGreen	0:616601bde9fb	337	#endif /* TCP_LISTEN_BACKLOG */
AdamGreen	0:616601bde9fb	338
AdamGreen	0:616601bde9fb	339	void tcp_recved (struct tcp_pcb *pcb, u16_t len);
AdamGreen	0:616601bde9fb	340	err_t tcp_bind (struct tcp_pcb pcb, ip_addr_t ipaddr,
AdamGreen	0:616601bde9fb	341	u16_t port);
AdamGreen	0:616601bde9fb	342	err_t tcp_connect (struct tcp_pcb pcb, ip_addr_t ipaddr,
AdamGreen	0:616601bde9fb	343	u16_t port, tcp_connected_fn connected);
AdamGreen	0:616601bde9fb	344
AdamGreen	0:616601bde9fb	345	struct tcp_pcb * tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog);
AdamGreen	0:616601bde9fb	346	#define tcp_listen(pcb) tcp_listen_with_backlog(pcb, TCP_DEFAULT_LISTEN_BACKLOG)
AdamGreen	0:616601bde9fb	347
AdamGreen	0:616601bde9fb	348	void tcp_abort (struct tcp_pcb *pcb);
AdamGreen	0:616601bde9fb	349	err_t tcp_close (struct tcp_pcb *pcb);
AdamGreen	0:616601bde9fb	350	err_t tcp_shutdown(struct tcp_pcb *pcb, int shut_rx, int shut_tx);
AdamGreen	0:616601bde9fb	351
AdamGreen	0:616601bde9fb	352	/* Flags for "apiflags" parameter in tcp_write */
AdamGreen	0:616601bde9fb	353	#define TCP_WRITE_FLAG_COPY 0x01
AdamGreen	0:616601bde9fb	354	#define TCP_WRITE_FLAG_MORE 0x02
AdamGreen	0:616601bde9fb	355
AdamGreen	0:616601bde9fb	356	err_t tcp_write (struct tcp_pcb pcb, const void dataptr, u16_t len,
AdamGreen	0:616601bde9fb	357	u8_t apiflags);
AdamGreen	0:616601bde9fb	358
AdamGreen	0:616601bde9fb	359	void tcp_setprio (struct tcp_pcb *pcb, u8_t prio);
AdamGreen	0:616601bde9fb	360
AdamGreen	0:616601bde9fb	361	#define TCP_PRIO_MIN 1
AdamGreen	0:616601bde9fb	362	#define TCP_PRIO_NORMAL 64
AdamGreen	0:616601bde9fb	363	#define TCP_PRIO_MAX 127
AdamGreen	0:616601bde9fb	364
AdamGreen	0:616601bde9fb	365	err_t tcp_output (struct tcp_pcb *pcb);
AdamGreen	0:616601bde9fb	366
AdamGreen	0:616601bde9fb	367
AdamGreen	0:616601bde9fb	368	const char* tcp_debug_state_str(enum tcp_state s);
AdamGreen	0:616601bde9fb	369
AdamGreen	0:616601bde9fb	370
AdamGreen	0:616601bde9fb	371	#ifdef __cplusplus
AdamGreen	0:616601bde9fb	372	}
AdamGreen	0:616601bde9fb	373	#endif
AdamGreen	0:616601bde9fb	374
AdamGreen	0:616601bde9fb	375	#endif /* LWIP_TCP */
AdamGreen	0:616601bde9fb	376
AdamGreen	0:616601bde9fb	377	#endif /* __LWIP_TCP_H__ */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	23 Feb 2012
Imports:	113
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	4
Followers:	6

NetStack/lwip/include/lwip/tcp.h@0:616601bde9fb, 2012-02-23 (annotated)

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